Out there in the shop I would have immediately drilled a hole through my own thumb! Ms. Hubbard, who ran the business for about 25 years after her husband's death and helped ensure the renewed vitality of the harpsichord as a performance instrument, died of cancer Sept. 22 in her Northampton home. Ms. Hubbard grew up in Albany, N.Y., where her father was postmaster and her mother, an immigrant with deep affection for the France of her early life, designed hats for the fashionable wives of politicians in the state capital.